Flush tank



A. E. COBB March 22, 1932.

FLUSH TANK Filed July so, 1931 IIELS- mum/T012 5 605B Q \JQT ToEA/zrns'.

Patented Mar. 22, 1932 ALTON E0033, or LOS ANGELES, CALIFORNIA FLUSH- TANK Application filed July 30,

This invention relates to flush tanks.

An object of the invention is to provide a flush tank having an inlet and an outlet, with the outlet controlled by a valve. Means is provided for holding the outlet valve open, after having been opened, and an object of the present invention is to provide a novel construction for causing the holding means or trip to release the outlet valve and permit it to close after it has been held open a period of time. 7

Another object of the invention is to provide'a flush tank construction wherein the parts are relatively simple and durable, for

accomplishing the desired function of the construction.

With the foregoing and other objects in view, which will be made manifest in the following detailed description, and specifically pointed out in the appended claims, reference is had to the accompanying drawings for an illustrative embodiment of the invention, wherein:

Fig. l is a sectional view through the improved flush tank.

Fig. 2 is a sectional view taken substantially upon the line 2-2 upon Figure 1.

Fig. 3 is a partial view on an enlarged scale, illustrating a detail of construction.

stantially upon the line 44 upon Figure 3.

Fig. 5 is a horizontal section taken substantially upon the line 5-5 upon Figure 2.

Referring to the accompanying drawings, wherein similar reference characters designate similar parts throughout, the improved flush tank consists of a tank 10, shown as being rectangular in form although the shape is immaterial. This tank has a closed top and an open bottom which is normally closed by a bottom closure 11 bolted or otherwise secured thereto as by bolts 12. An inlet pipe 13 leads into the tank and is provided with a T 14 discharging into the tank. A pipe 15 leads from the T up through an elbow 16 to a needle valve 17, the needle of which is adjusted by an adjusting rod 18 which eX-- tends through between closure 11 and which is provided with a handle 19. From theneedle valve there is a standpipe 20 leading tank Fig. 4 is a horizontal section taken sub-- 1931. Serial No. 554,052.

upwardly to a point adjacent the top of the and having a downwardly directed outlet 21. An operating tank 22 has brackets 23 which are slidable on the standpipe 20 and this operating tank -has its open top positioned beneath outlet 21. In its bottom there is an outlet 24 having a, downwardly closing check valve 25. A rod 26 extends through the bottom closure 11 and may'have its upper end adjusted by rotating handle 27. I This stem like rod 18 is threaded through the bottom closure. The upper end of the'rod extends into the outlet 24 so as to becapable of 1 engaging the under side of valve 25 when the operating tank lowers, so that on lowering the operating tank its outlet valve 25 will be opened by rod 26. A lever 28 is pivoted on a yoke 29 which is vertically adjusted on stand- PATENT OFFICE pipe 20 and a link 30'connects this lever to g the operating tank. 'Lever 28' is also con nected to a counterbalance weight 31 which is slightly heavier than the weight of the operating tank when the operating tank isempty. Counterbalance weight 31 is connected to a lever 32 which is pivoted on an arm 33 of a support 34 which may be mounted on bottomclosure '11. This support has pivoted thereto a'trip 35. movement arrested by arm 33 but canbe swung upwardly about its pivot when'engaged by pawl 36'piv0ted'as at 37 on lever 32. ownward movement of'this pawl is limited by a stop 38. The support 34 is so positioned and trip'35 is so positioned as to be engageable by the outlet valve 39 controlling the outlet 40 leading from the flush tank. Outlet 40 has connected thereto a fitting 41 in which a crank 42 is rotatable. This crank is rotatable by a handle 43 and carries a con-,

'necting rod 44 which is connected by a link 45 to the outlet valve 39. Outlet 40 is materially larger in diameter than'the inlet provided by T14. V i I The operation and advantages of the improved flush tank are as follows. Inlet pipe 13 is connected to a suitable source of water supply. The level of water in the tank indicated at 46 is established by the pressure of the entrapped air in the top of the tank becoming equal tothe pressure of water in Trip 35 has its downward 51: u de.

use

inlet pipe 13. When the handle 43 is rotated,

this rotates crank 42 lifting valve 39 into the dotted line position shown in Figure 2. As the valve swings through its are it encounters .trip35, lifts the trip and permits the trip to drop past the edge of the valve coming to rest on arm 33. When the handle is releasdfvzilve encounters the trip and is held in the dotted line position. This per- 0 mits water in the flush tank to pass out through outletfl40. Of course, as soon as- Water'starts flowing through the outlet, additional water is being supplied to the tank 1 through T 14 but as the outlet from the tank is larger than the inlet, the water level in tlie 1 tank will gradually lower. The water in the -operating tank 22 is entrapped therein when yg the tmklis in the position shown in Figure 1.

Consequently as the water level 46 on the of the operating..:tank'lowers, the weight of water entrapped in the operating tank cooperates with the weight of the tank v ."toaover-halance the counterbalanceweight.

: This moves the counterbalanceweight 31 upwardlywith-the result that pawl-36 passes: over the tripand assumes a "position beneath it. -As theoperating tank slides down on. standpipe .20, its outlet valve 25 encounters rod 26 andis opened by it permitting water in the operati'ng tank to flow out and reducthe combined. weight of the operating tank andcontained Water. When the com-, binedwe'ight is sufiiciently reduced, thecoun-. .terbalance Wei ht 31 becomes eflective to' f-TlllS. swings lever, 32 and causes: pawl 36 to lift trip 35,1'eleasin it to close. When t e valve 39 is closed water continues to flow into the tankuntilanequilibriunrof conditions is established, returning the .watenlevellfi to-the elevation as. shown. The operating tank 22 is refilled by water discharging through outlet 21. The downwa rd movement of the operatingtank is stop construction may ing this movement. From the above described construction :it

, flushtankhas been provided. It will :be noted thatall of the operating structure smounted on the bottom closure 11 permitting the bottom closure, with associat apparatus, to be readily installed within a tanklO, Inthe eventthat any part. should get outof order 10 can be easily removed which exposes the entire constructi0n,;making it quite easy to repair or ,replace. any parts.

' counterbalance ing tank, ingtank ered-due to. the fall of liquid level in the tank.

overbalance Ithe.operating tankand contents.

1. A flush tank comprising a tank having an inlet and an outlet, a. valve controlling the outlet, a trip for holding the valve open after having-been opened, an operating tank mov-- able; in said-tank adapted to be filled with l quid, a counterbalance weight counterbalancing the operating tank and causing it to assume an upperposition when surrounded tank, means operable by the weightto cause the trip to release the valve and permit the valve to close when the level of water in the tank lowers producing a lowering ,of jtheoperatby water in the to discharge its contents when low- 2. A flush: tan-k comprising a tank having an inlet andianou'tlet,avalve controlling the outlet, a trip for holdingthe valve open after having been opened, means engageable with thetrip for causing thetrip to release the .valve,vmeans for operating said means comprising an operating tank having a valve controlled outlet and a counterbalance weight,

and means for openmgthe valve controlled .outlet of the operating tankwhenit is low- .ered by thelowering of the liquid level. :in'

the tank.

and means for opening the operat- .lnfitestimony. whereof I have signed my name to this specification.

ALTON COBB.

valve 39and permitting i" limited by engagement of the lower bracket. j (I 23 with collar '29," although any other suitable be. provided for limitor require replacement, tank. I

through the stand-pipe 20 and through the a outlet .21 for refilling the operating tank22, I

' isadjusted by, adjusting the needle valve.

7 Various changes may 7 be made in the details of construction WlthOlltdGPfl-ItlfigfT-ODI 

